{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Equilibrium cluster size is predicted semiquantitatively with a free energy model that balances short - ranged depletion and van der Waals attractions with longer - ranged electrostatic repulsion , as a function of the Au and polymer concentrations ."}
{"Chemical": ["Au"]}